I have the same slowdown on sid after switching to a bigmem kernel: xserver-xorg-video-intel 2:2.8.1-1xserver-xorg 1:7.4+4
xserver-xorg-core 2:1.6.3-1+b1 Running linux-image-2.6.30-1-686-bigmem 2.6.30-6 => TREMENDOUSLY slow (X eats almost 100% cpu, keyboard typing is like 2 chars / sec) Switching back to linux-image-2.6.30-1-686 2.6.30-6 => perfectly normal and usable Hope this helps -- Eric